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| Formato: | Artículo científico |
| Lenguaje: | en |
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Sociedad Geológica Mexicana, A.C.
2017
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| Acceso en línea: | https://www.redalyc.org/articulo.oa?id=94353719010 https://www.redalyc.org/journal/943/94353719010/ https://www.redalyc.org/journal/943/94353719010/html/ https://www.redalyc.org/journal/943/94353719010/94353719010.epub https://www.redalyc.org/journal/943/94353719010/movil |
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- Field guide to the Jurassic Otlaltepec and Tezoatlán Basins, southern Mexico: sedimentological and paleontological records of Puebla and Oaxaca Michelangelo Martini Patricia Velasco-de León Mildred Zepeda-Martínez Diego E. Lozano-Carmona Mónica Ramírez-Calderón Ciencias de la Tierra intra Pangea breakup Jurassic flora southern Mexico con tinental rift basin By early Mesozoic time, a major plate reorgani - zation produced the breakup of Pangea, which was the most recent supercontinent assembled on Earth. Due to its paleogeographic position along the emergent plate boundary between North and South America, the early Mesozoic tectonic history of Mexico was dominated by the development of major normal to strike-slip faults. These faults produced a complex crustal configuration characterized by subsiding ba - sins bounded by exhuming basement highs. Voluminous, continental to marine sedimenta - ry successions were accumulated into these ba - sins during the Jurassic, representing a unique stratigraphic record related to the fragmenta - tion of the western equatorial margin of this supercontinental mass. This field trip will provide an overview of the Otlaltepec and Tezoatlán Jurassic Basins that are exposed in the states of Puebla and Oax - aca, southern Mexico. Observed outcrops are exposed along two amazing canyons and con - sist of alluvial-fluvial to marine clastic deposits. Major provenance changes are recorded in the Jurassic successions of the Otlaltepec and Tezoatlán Basins and are interpreted as the result of exhumation of different fault-bound - ed lithospheric blocks during Pangea breakup. The integration of petrological and paleonto - logical data indicates that these major chang - es in provenance of clastic rocks match with changes in climatic conditions. Therefore, in this field trip, we will have the opportunity to explore the hypothesis that the progressive exhumation of lithospheric blocks during the fragmentation of Pangea could have produced major topographic changes that favored local variations in climatic conditions and conse - quently, the diversification of floral assemblag - es in Mexico. 2017 artículo científico 1405-3322 https://www.redalyc.org/articulo.oa?id=94353719010 https://www.redalyc.org/journal/943/94353719010/ https://www.redalyc.org/journal/943/94353719010/html/ https://www.redalyc.org/journal/943/94353719010/94353719010.epub https://www.redalyc.org/journal/943/94353719010/movil en http://www.redalyc.org/revista.oa?id=943 Boletín de la Sociedad Geológica Mexicana application/pdf Sociedad Geológica Mexicana, A.C. Boletín de la Sociedad Geológica Mexicana (México) Num.3 Vol.69